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Changed comments on foreign C++ exceptions (generated with type info 7),

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handling with references to 
http://sourcery.mentor.com/public/cxx-abi/abi-eh.html (r 1.22).

llvm-svn: 140695
This commit is contained in:
Garrison Venn 2011-09-28 10:53:56 +00:00
parent 638a8b94be
commit 473050b066
1 changed files with 9 additions and 8 deletions
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17
examples/ExceptionDemo/ExceptionDemo.cpp
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@ -40,7 +40,8 @@
//
// Cases -1 and 7 are caught by a C++ test harness where the validity of
// of a C++ catch(...) clause catching a generated exception with a
// type info type of 7 is questionable.
// type info type of 7 is explained by: example in rules 1.6.4 in
// http://sourcery.mentor.com/public/cxx-abi/abi-eh.html (v1.22)
//
// This code uses code from the llvm compiler-rt project and the llvm
// Kaleidoscope project.
@ -86,7 +87,7 @@
#endif
// System C++ ABI unwind types from:
// http://refspecs.freestandards.org/abi-eh-1.21.html
// http://sourcery.mentor.com/public/cxx-abi/abi-eh.html (v1.22)
extern "C" {
@ -1663,12 +1664,12 @@ void runExceptionThrow(llvm::ExecutionEngine *engine,
exc.what());
}
catch (...) {
// Catch all exceptions including our generated ones. I'm not sure
// why this latter functionality should work, as it seems that
// our exceptions should be foreign to C++ (the _Unwind_Exception::
// exception_class should be different from the one used by C++), and
// therefore C++ should ignore the generated exceptions.
// Catch all exceptions including our generated ones. This latter
// functionality works according to the example in rules 1.6.4 of
// http://sourcery.mentor.com/public/cxx-abi/abi-eh.html (v1.22),
// given that these will be exceptions foreign to C++
// (the _Unwind_Exception::exception_class should be different from
// the one used by C++).
fprintf(stderr,
"\nrunExceptionThrow(...):In C++ catch all.\n");
}